本文選題：碎石 + 產(chǎn)流��； 參考：《山地學(xué)報(bào)》2017年04期

【摘要】：土壤中的碎石改變了均質(zhì)土壤的容重、孔隙度與孔徑分布等物理性質(zhì),從而對(duì)土壤水文與侵蝕過(guò)程造成影響。該研究在室內(nèi)人工模擬降雨條件下,對(duì)6種不同碎石體積含量(0,5%,10%,20%,30%,40%)紫色土坡面的水文過(guò)程進(jìn)行了模擬。結(jié)果表明,徑流系數(shù)與碎石含量之間差異顯著(F=115,P0.01)且呈顯著正相關(guān)關(guān)系;土壤濕潤(rùn)鋒隨著碎石含量的增大呈增加的趨勢(shì);不同碎石含量的土壤坡面起始產(chǎn)流時(shí)間差異顯著(F=208,P0.01),且產(chǎn)流時(shí)間隨碎石含量的增加而減小;碎石含量為20%時(shí),土壤平均產(chǎn)流量最高,超過(guò)20%時(shí),產(chǎn)流量反而降低;但碎石含量對(duì)徑流流速?zèng)]有顯著影響。該研究結(jié)果可以為碎石含量在紫色土中的作用機(jī)理提供理論基礎(chǔ),同時(shí)為紫色土區(qū)土壤資源的合理利用提供科學(xué)依據(jù)。
[Abstract]:The gravel in soil changes the physical properties of homogeneous soil, such as bulk density, porosity and pore size distribution, thus affecting the soil hydrology and erosion process. In this study, the hydrological process of purple soil slope surface was simulated under the condition of artificial rainfall in laboratory, and six different kinds of gravel volume content (0 ~ 5 ~ 10 ~ 10 ~ 20 ~ 30 ~ 40%) were simulated. The results showed that there was a significant difference between runoff coefficient and gravel content (F _ (115) P _ (0.01) and there was a significant positive correlation between runoff coefficient and gravel content, and the soil wetting front showed an increasing trend with the increase of gravel content. The initial runoff production time of soil slope with different crushed stone content was significantly different (FF208U P0.01), and the runoff time decreased with the increase of gravel content, and the average soil runoff was the highest when the gravel content was 20g, but decreased when the gravel content was more than 20g. However, the gravel content has no significant effect on the runoff velocity. The results can provide a theoretical basis for the action mechanism of gravel content in purple soil and scientific basis for the rational utilization of soil resources in purple soil area.
【作者單位】： 西南大學(xué)資源環(huán)境學(xué)院三峽庫(kù)區(qū)生態(tài)環(huán)境教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院水利部水土保持研究所黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金青年項(xiàng)目(41401298) 中國(guó)科學(xué)院水利部水土保持研究所黃土高原土壤侵蝕與旱地農(nóng)業(yè)國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金項(xiàng)目(K318009902-1418) 西南大學(xué)大學(xué)生科技創(chuàng)新“光炯”培育項(xiàng)目(20140105)~~
【分類(lèi)號(hào)】：S157.1

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